Summer Michelle Hansen, a former specialeducation teacher, has been charged with sexcrimes involving five underage boys, allstudents at the Southern California high schoolwhere she once taught.

Hansen, arrested in June, is scheduled to bearraigned Thursday on 16 felony counts,including unlawful sexual intercourse with aminor, unlawful oral copulation with a minor,and sending harmful matter to a minor. Ifconvicted, she could face up to 13 years in stateprison.

In a statement released Tuesday, the RiversideDistrict Attorney's Office said the alleged crimestook place between May 2012 and May 2013,and occurred "in her classroom, in a utilityroom at the school, in her vehicle while parkednear one victim’s home, and at another victim’shome." None of the victims were students thatHansen taught.

Hansen's attorney has maintained herinnocence, and claims that the former teacherhad her phone hacked, according to theCorona Press-Enterprise. Court documentsobtained by the newspaper tell a different story.

According to a Corona police declaration, oneof Hansen's victims told a detective that theteacher had sent him "inappropriate textmessages suggesting sexual contact" thatculminated in the teacher offering him sex as aprize for doing well in a baseball game.

An investigation of Hansen was launched inJune after a former student at Centennial HighSchool came forward and told officials that hehad a sexual relationship with the teacher.

According to the Press-Enterprise, that student"told police that while he was 18 and after hegraduated, Hansen would send him sexual textmessages and cellphone photos that showedher in her underwear. The former student alsosaid two underage boys told him that they hadhad sex with Hansen."

During the course of their investigation, thepolice identified multiple victims under the ageof 18.